Hello, I am retired, with limited income. It is taking close to 2 months to get a z97 Gigabyte RMA motherboard back. In the meantime, I bought an Asus z97 Pro online, but found that my G. Skill DDR3, 1866 memory isn't compatible with it, so I am getting some Corsair Vengeance DDR3, 1600 memory today. My CPU is an I5-4570k. I want to upgrade to a CPU, MB and memory more recent, perhaps a year or two old. Any advice on combinations would be greatly appreciated. $300 to $400 is my hope.